Re: 3.9 2002 Conv Van - mileage?
[Re: Sixpak]
#2111339
07/16/16 09:04 PM
07/16/16 09:04 PM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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My sister's old '97 with the same drivetrain would get 16 ~ 16.5 hwy MPG running 75 ~ 80. I don't know the city mileage, she never tracked it.
Robert
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: 3.9 2002 Conv Van - mileage?
[Re: 79powerwagon]
#2112380
07/18/16 12:43 PM
07/18/16 12:43 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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27 mpg out of a six cylinder van? No way. Ever! Unless your constant speed in a vacuum was 35 mph.
27, maybe going downhill in neutral. Otherwise, no. My parents 2wd, 3.9 auto trans, 95 dakota did upper teens highway MPG at best. If you're pushing a 4000 pound garden shed down the highway with a 3.9 and getting in the teens mpg, that's right in the ball park.
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Re: 3.9 2002 Conv Van - mileage?
[Re: Sixpak]
#2112457
07/18/16 02:11 PM
07/18/16 02:11 PM
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Joined: Jan 2005
Posts: 12,423 Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,423
Kalispell Mt.
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I have never seen higher than a 3.55 gear come with any automatic OD trans, I would like to see a pic of the option sticker for any vehicle that had one. The combo you have is getting just a hair less than I think it should but could easily be the driver, my wife typically gets 1/2 the MPG I do in the same rigs, she gets 9 or so in our B3500 and I get about 18 but it is a 5.9 with OD (I built a 44RE for it as it had no trans when I bought it and I prefer the smaller one) so actual displacement per mile is nearly the same as yours, (360X.69)=248 vs 239 per driveshaft revolution. In general I have found this to be a good baseline predictor of what MPG a vehicle should get. I added a CAI and slotted and advanced the crank sensor to advance it, I got 2 degrees more advance. I also went from the factory 245-75-16 tires to a taller and narrower 235-85-16. I did not do a before test so it just is what it is. I would like to lower it a tad and stick in a 3.21 gear to see what I get. Ours is not a conversion van but a 15 passenger with 1 seat removed, I don't know how that compares weight wise to a conversion van. I think if you are not gonna swap in an OD than a 3.23 or even 2.94 gear would help, not drastically but some for sure, we are not building these for racing (at least I'm not). Also you could add the ford 4.6-5.4 injectors for a tad better MPG, yours being made after 1999 needs a set of cheap e-bay plug adapters to bolt them in.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 3.9 2002 Conv Van - mileage?
[Re: HotRodDave]
#2112792
07/18/16 09:44 PM
07/18/16 09:44 PM
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Joined: Jan 2003
Posts: 16,840 Between Houston & Galveston TX
SattyNoCar
Smarter than no class Flappergass by a mile
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Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,840
Between Houston & Galveston TX
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Didn't know you could get anything in 2002 without an OD... Or, do you mean its not working? Either way, my stone stock '93 Dakota gives me a pretty consistent 14MPG in 100% in town driving. The two times I've driven it some distance on the open highway, it gave me in the low 20's. The OD in my Dak works fine. I turned it off once to see the RPM difference at hwy speed....
John
The dream is dead, long live the dream.......😥
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Re: 3.9 2002 Conv Van - mileage?
[Re: SattyNoCar]
#2113135
07/19/16 11:29 AM
07/19/16 11:29 AM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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Didn't know you could get anything in 2002 without an OD... Or, do you mean its not working? Either way, my stone stock '93 Dakota gives me a pretty consistent 14MPG in 100% in town driving. The two times I've driven it some distance on the open highway, it gave me in the low 20's. The OD in my Dak works fine. I turned it off once to see the RPM difference at hwy speed.... Dodge used to build conversion van packages, specifically to be sold to conversion companies. The base V6 non overdrive (32RH) was the basest of all. IIRC, all of them set code 37 because there's no overdrive and no specific non overdrive PCM to compensate. Again if memory serves, they were available as B1500 and B2500's. Robert
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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